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CAT25C08LE-GT3 Datasheet(Hoja de datos) 4 Page - Catalyst Semiconductor

No. de Pieza. CAT25C08LE-GT3
Descripción  8K/16K SPI Serial CMOS EEPROM
Descarga  16 Pages
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Fabricante  CATALYST [Catalyst Semiconductor]
Página de inicio  http://www.catalyst-semiconductor.com
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CAT25C08/16
Doc. No. 1016, Rev. C
© 2006 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
FUNCTIONAL DESCRIPTION
The CAT25C08/16 supports the SPI bus data transmis-
sion protocol. The synchronous Serial Peripheral Inter-
face (SPI) helps the CAT25C08/16 to interface directly
with many of today’s popular microcontrollers. The
CAT25C08/16 contains an 8-bit instruction register.
(The instruction set and the operation codes are de-
tailed in the instruction set table)
After the device is selected with
CS going low, the first
byte will be received. The part is accessed via the SI pin,
with data being clocked in on the rising edge of SCK.
The first byte contains one of the six op-codes that define
the operation to be performed.
Instruction
Opcode
Operation
WREN
0000 0110
Enable Write Operations
WRDI
0000 0100
Disable Write Operations
RDSR
0000 0101
Read Status Register
WRSR
0000 0001
Write Status Register
READ
0000 0011
Read Data from Memory
WRITE
0000 0010
Write Data to Memory
INSTRUCTION SET
PIN DESCRIPTION
SI: Serial Input
SI is the serial data input pin. This pin is used to input all
opcodes, byte addresses, and data to be written to the
25C08/16. Input data is latched on the rising edge of the
serial clock for SPI modes (0, 0 & 1, 1).
SO: Serial Output
SO is the serial data output pin. This pin is used to
transfer data out of the 25C08/16. During a read cycle,
data is shifted out on the falling edge of the serial clock
for SPI modes (0,0 & 1,1).
SCK: Serial Clock
SCK is the serial clock pin. This pin is used to synchro-
nize the communication between the microcontroller
Figure 1. Sychronous Data Timing
VALID IN
VIH
VIL
tCSS
VIH
VIL
VIH
VIL
VOH
VOL
HI-Z
tSU
tH
tWH
tWL
tV
tCS
tCSH
tHO
tDIS
HI-Z
CS
SCK
SI
SO
tRI
tFI
Note: Dashed Line= mode (1, 1) – ––––




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